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3.
 In 1920 automated car parking in U.S cities Los angles, new york , chicago This system is found all over Japan in 1923 The nash company created first glass enclosed version in 1933. In later years in Europe as smart car towers In 1983 Kent automated parking garage was built in new york Developed in 20th century.

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 Parking system is based around micro controller and sensors This process is quick and efficient.

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 Stepper motor Stepper motor is a digital device It follows the instruction as the computer does do It is used for the movement of lift U-SHAPED PHOTO SENSORS The anode of IRED is connected to the power supply via the. The resistor adjusts the irradiance by limiting the forward current of the IRED. If an object is moving between the gap the light will be blocked and the transistor base will on, hence give an high output.

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 SEVEN SEGMENT DISPLAY Used for displaying numbers and some letters Microcontroller Port2 is use to handle the display unit.

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 Serial Interfacing: This unit is to display the number of cars in parking lot on the computer. The computer may be placed in any control room. In null modem mode pin 7,8 and pin 6,4 are shorted with each other. While pin 3 is used for transmit data and pin 2 for reception

8.
 The 8051 is the brain of this whole hardware. It reads the input signals and start sending the stepping sequences to the motor. When the input beam of S1 is blocked motor start rotating in clockwise direction. S1 indicates that a car has come. The S2 sensor is used as the gate open limit sensor when S2=ON it means gate is completely opened. motor start rotating in counter clockwise direction, closing now. Finally, when S3=ON it indicates that gate is completely closed now. A display is provided at the ground floor that displays number of cars in each floor.

9.
 An indicator with a green and red LED is kept in all the floors. Indicate whether the lift is busy or is it ready to take the car up or down. seven segment display indicates that a car has entered in the parking lot. This display is basically for the people, which are driving the car. serial interfacing display is for the person in control room.

12.
 Over 5,000 parking systems in use worldwide. Less Pollution Security from Theft and Car Damages Save you space, time & money Simple structure, simple operation Speedy system, moves smoothly, not noisy. It can be constructed and implemented in residential areas.

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 Parking lots also tend to be subject to contamination. concentrated spots of pollutants such as motor oil. preferred shaded parking spaces in the summer. planting trees because of the extra cost of cleaning the parking lot .

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 Important factor in traffic areas Automated without human being Stepper motor plays a vital role Seven segment display is used at every floor Sensors are used for sensing the car This system is present in DELHI, MUMBAI, BANGLORE